More. You wrote: “but can he keep it this time?
can he stay, no matter what?”

I am suggesting that to KEEP the job this time, maybe the attitude to take is to NOT stay No Matter What. That it will not be another exercise of tolerating distress only, but be an opportunity to achieve something personal as in practicing assertiveness.

If you tried in the past to stay in a job No Matter What and you failed again and again, then to stay longer in a job, maybe the way for you to go is to not intend to stay no matter what…?

See I already have input on your new job, if there is one…

anita